Sanalista

def parillinen(s):
	for i in s:
		if s.count(i) % 2 == 0:
			continue
		else:
			return False
	return True



x = int(input())
lista = []
for i in range(x):
	lista.append(input())
summa = 0
for i in lista:

	if parillinen(i):
		summa+=1
print(summa)

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED